<template>
  <div class="list" ref="wrapper">
    <div>
      <div class="present-area">
        <div class="present-title" ref="present">
          当前
        </div>
        <div class="present-button" @click="handlePresentClick()">
          {{this.$store.state.city}}
        </div>
      </div>
      <div class="hot-area">
        <div class="hot-title">
          热门城市
        </div>
        <div class="hot-list">
          <div class="hot-button" v-for="item of hotCities" :key="item.id" @click="handleCurrentClick(item.name)">
            {{item.name}}
          </div>
        </div>
      </div>
      <div class="alph-area">
        <div class="alph-wrapper" v-for="(item,key) of cities" :key="key" :ref="key">
          <div class="alph-title">
            {{key}}
          </div>
          <div class="alph-list">
            <div class="alph-button border-bottom" v-for="innerItem of item" :key="innerItem.id" @click="handleAlphClick(innerItem.name)">
              {{innerItem.name}}
            </div>
          </div>
        </div>
      </div>
    </div>
  </div>
</template>
<script>
  import BScroll from 'better-scroll'
  import BMap from 'BMap'
  export default {
    name: 'locationList',
    props: {
      letter: String,
      cities: Object,
      hotCities: Array
    },
    watch: {
      letter() {
        const elementLetter = this.$refs[this.letter]
        const elementPresent = this.$refs.present
        if (elementLetter) {
          const element = elementLetter[0];
          this.scroll.scrollToElement(element);
        } else {
          this.scroll.scrollToElement(elementPresent);
        }
      }
    },
    data() {
      return {
        city: '',
      }
    },
    methods: {
      handleCurrentClick(city) {
        this.$store.dispatch('change', city)
        this.$router.push('/')
      },
      handleAlphClick(city) {
        this.$store.dispatch('change', city)
        this.$router.push('/')
      },
      handlePresentClick() {
        this.$router.push('/')
      }
    },
    mounted() {
      this.scroll = new BScroll($this.$refs.wrapper,
        {
          click: true,
          mouseWheel: {
            speed: 20,
            invert: false,
            easeTime: 300
          }
        })
    },
}</script>

<style lang="stylus" scoped>
  .border-bottom
  &:before
  border:solid .04rem #ccc

  .list
  overflow:hidden
  background:#e9ecf1
  position:absolute
  top:1.12rem
  left:0
  bottom:0,
  width:100%
  z-index:1

  .hot-list
  overflow:hidden

  .present-title, .hot-title, .alph-title
  margin-left:.4rem
  padding:.4rem 0

  .hot-title
  margin-bottom:-.3rem

  .present-button, .hot-button, .alph-button
  line-height:.44rem
  padding:.2rem .2rem
  background:#fff

  .present-button
  width:84%
  margin-left:.2rem

  .hot-button
  width:15%
  float:left
  margin-left:.2rem
  text-align:center
  margin-top:.2rem

  .alph-button
  width:100%
  padding-left:.4rem


</style>
